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This study was approved by the University of British Columbia’s Behavioural Research Ethics Board (certificate # H11–00547). All participants provided written informed consent prior to being interviewed or included in participant observations, and were asked to select a pseudonym. Interviews were conducted either in person or by telephone. Participants were asked to complete a five-item socio-demographic questionnaire prior to the semi-structured interview. Interviews were audio-recorded and transcribed verbatim and participants were given the opportunity to review their transcripts for any errors or revisions.

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The authors declare that they have no competing interests.

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